Feitz salathe



UNITEDl STATES PATENT OFFICE.

FRITZ SALATHE, JOHN E. BRUSTLEIN, AND4 PAUL SURY, lO F NEW YORK, N. Y.

ELECTRIC LAMP?.l

sracrrrca'rron forming pm 'of 1mm ai clan'tyaatmmrasn Application tllcd March 5, 1w. (No modem.

To all whom' it may concern:

Be it known that we, Farrz SALATH, J on E. BEUSTLEIN, and PAUL SURY, all of the city of New York, in the county and State of New York, have invented certain new and useful Improvements in Electric Lights, o f which the following is a specification.

One of our improvements consists in the combinatiom'in an electric light, of a transparent shell or globe, two metallic-rodconductors arranged in said shell or globe, a carbon ring forming the incandescent or light-giving portion of the electric circuit, and carbon clamps holding the carbon ring' between' them, and secured upon the metallic-rod conductors by means ot screw-nuts, whereby the said rodconductors are prevented from being unduly h eated by the great heat of the incandescent ring.

Another of our improvements consists in the combination, in au electric light, of a closed transparent shell or globe, a carbo'r other light-giving device arranged therein, and two vases or vessels, one containing a chemical or chemicals for absorbing oxygen, and the other a substance for absorbing nitrogen, placed one within the other, and arranged in the shell or globe. One or both of the vases or vessels which contain the chemicalor chemicals may be silvered upon its-exterior or otherwise-pre pared so as to form a reflecting-surface for retlecting rays ot' light outward.

In the accompanyingdrawings, Figure 1 represents a central vertical section of an electric lamp embodying our improvements; and Fig. 2 represents a horizontal section thereof upon the dotted line :v tv, Fig. 1.

Similar letters of reference designate corresponding partsin both the figures.

Adesignates the shell or globe for contain4 ing thelight-giving devices, and which -may be' of any desirable size. As here represented, its upper end, A', is convex internally, so that it forms a reflector for reflecting the rays ot' light downward and'outward, as illustrated by the broken lines in Fig. 1. The retlecting-power of this lenticular portion may be greatly increased by'silvering or otherwise preparing its inner surface.

stitute the conductors through which the electric cul'rentis passed', the positive conductor of a battery or electric machine ing connected to one rod, and the negative conductor. to the other rod.

y O designates thecarbon or.li'ghtgiving de- 6o vice, here represented as in the form ot' a carbon ring, adapted to be heated to a point of incandescenceby the resistance olered to the passage of the electric current through it.

The said ring issupported'by means of clamps 65 a, of carbon, holding the ring between them, and tted upon the ends of the rod-couductors, to

which-they are secured by means of screw-nuts b ttted to th'e rod-conductors. This arrangem'ent of carbon clamps for holding vente the rods B from being injured by the great heat ofthe ring, when heated to a p'ont of incandescense.

D designates vases, vessels, or receptacles, l ot' which two are 'here represented, one placed 7 5 inside the other, and both arranged in the shell or globe A, which should be closed and sealed air-tight. These vases or vessels are for the purpose of containing a chemical or chemicals having the power of absorption. vessels, alter being lllled with' the chemical or chemicals, are stopped by meansof stoppers C, made of asbestos or other suitable material which is sulliciently porous to allow the air or gas contained in the shell or globe to reach the chemical or chemicals in the vases or vessels, but which will confine the ehemicalsduring'the time of the insertion of the said vases or vessels iuto the shell or glcbe. By employing different chemicals in there vessels or vases the 9o atmospheric air contained in the shell or globe at thctime ot' closing or sealing it is deprived of its oxygen by absorption, while a large percentage ot' the remaining nitrogen is also absorbed and a partial vacuum produced,

which tends to preserve the carbon or other electrodes. Apartialvacuum willbeproduced bythe absorption of the oxygen, and this may be all that is'desired in some cases; but in orderA to obtain a more nearly perfect Vacuum, roo

Thevases or 8o we preferably also employ a vase o r vessel containing a chemical for absorbing the remaining nitrogen. 1f at the timeof sealingor closing the shell or globe wey ll the vessel or vase incloscd therein with pyrogalate of poltassium, sulphate of iron, chloride of iron, or

metallic sodium, either of which is an absorbent of oxygen, a partial vacuum will be produced and maintained by the absorption of the oxygen, leaving nitrogen-gas of a low tension.' If a second vase or vessel be filled with freshlyburned charcoal and inclosed in the shell or globe, a'large portion of thesnitrogen will .be absorbed and the vacuum made more nearly perfect.

Various methods may be adapted for hermetically sealing the shell or globeafter the introduction of thegas. In the preseutexample of our invention we have represented a disk of cork, E, which fits the shell or globe tightly, and has upon its face a disk of wood, F, in which the metallic-rod conductors are fixed. After inserting the cork stopper, asphaltum in" a melted state or other suitable material' may be poured over the cork for sealiu g it, as represented at G, Fig. 1.

In order to increase the reflecting-surface of the lamp, one or both of the Vvases or vessels D may have a silvered surface.

We are aware that it is old to chargethe shell or globe of an electric lamp with nitrogen-gas and place therein a small piece of sodium or other chemical to absorb whatever oxygen may enter the shell or globe through leakage. Qur invention diers from this in that we employ a shell or globe filled first with atmospheric air, and a large amount of chemical is necessary to absorb the oxygen-so much, indeed, that it could notbe introduced withoutsome special arrangement for its reception. The vases or vessels being arranged one within the other may be placed in the center of the shell or globe,

and will not therefore interfere with the trans# holding the carbon ring between them fitting upon the metallic-rod conductors, and screwnuts for tightening said clamps upon said rods, substantially as and forl the purpose speciiied.

2. The combination, in an electric light, ot' a y closed transparent shell or globe, a carbon or other light-giving devicearranged therein, and two vases or vessels,one containinga chemical or chemicals for absorbing oxygen and the other a substance for absorbing nitrogen, placed one within the other and, arranged in the shell or vglobe substantially as specilied.

3. 'lhe combination, in an electric lamp, of a closed transparent shell or globe, a carbon or otherligb tgi vin g device arranged therein, and a vase or vessel for holdingaehemical, alsoar.- ranged in said shell or globe, and havnga sil vered surface, whereby it is made to constitute a reilectorsubstantially as and for the purpose specified..

' F. SALATHE.

J. E. BRUSTLEIN.

A. 0;-WEBB. 

